Saw the founder (Ed I.) on CNBC Fast Money on Friday (july 11). He said Dayjet's still doing fine, just had to scale back to less-aggressive expansion plans when expected funding didn't materialize. He believes that even though the economy is struggling, DayJet's business will be minimally affected because most of the clients are those that are in core businesses, that is businesses in which the work has to get done regardless of the economy (lawyers, accountants, etc).
Of course, what the founder says and what is reality could be two different things. I was in Boca a few weeks back and saw 12 planes sitting on the ramp. It's got to be hard to make money if that much of the fleet isn't moving.